Adjusting and fastening ring.



' 'PATENTED JULY 31, 1906'.

0. SCHMIDT.

ADJUSTING AND FASTENING RING.

, APPLICATION FILED 00129, 1903.

-nNrTEn' sra rns PATENT oFFroE.

CARL SGHMIDT, or median, GERMANY.

ADJUSTING AND FASTENING RING.

Specification of Letters Patent.

PatentedJuly a1, 1906.

Application filed October 29,1903. Serial No. 179,050.

. To all whom it may concern.-

Be it known-that I, CARL SoHMiDT, engineer, a subject of the King of Prussia, Ger 'man Emperor, residing at 2 Schneberger strcet,Tegel, Germany, have invented a cer tain new and useful Adjusting and Fastening Ring, of which the followingis a full,

clear, and exact description.

The'present invention relates to a setting and fastening device in the construction of which'use is made of the well-known action which two rings eccentrically turned one within the other exert upon a shaft passing through them.

The invention is especially designed for shaft-couplings and belt-pulley fastenings.

The ring, coupling, or the belt-pulley fas- 'tening possesses no projecting parts, such as screws or Wedges. It is therefore safer against accident, does not damage the shaft, and

. renders the mounting exceptionally easy.

Referring to the accompanying drawings,

Figure 1 shows an elevation and partial sec? tion through the fastening or @setting device Fig. 2 shows an elein the locked position. vation of the same. Fig. 3 showsaview of thering A. Fig. 4 shows the cap B.

The setting and fastening ring A, provided with acentral concentric bore E, is to be fixed upon the shaft 0 with the help of the cap B, which also has concentric bore F. For

this object the concentric ring A is provided with an eccentric projection 11., cut or beveled in both'directi'ons, as shown, andthe concentric cap B is providedwith a correspond- Y ingly -formed eccentric groove 1), as shown in Figs. 1 and 4. The diameter of the eccentric groove 1) in thecap, B must be somewhat greater than the diameter of the eccentric rojecting part a of the ring A, so that the capcan be moved longitudinally overthe shaft and can pass With. the edges of its groove-t over theprojecting part a of the ring A.

' When the two parts are brought together longitudinally into the properposition, they are turned relatively to one another around the shaft, and in consequence of the eccentricity of the projecting part a and of the groove 1) the two parts are then pressed tightly upon the shaft. Now inorder that the ring A in its function as setting and fastening rin may not 'be' pressed cornerwise hss upon the s 'aft the cap B must come so far over the projection a of rin A and the width of the projecting. part a and the depth ofthe groove b must be such that the pressure forcforced strongly against the ot the shaft or freeing the same ing the ring A upon the shaft is exerted within.-the cylindrical internal surface of said ring. For this object the cap B is made to press the ring A upon the shaft at such an angle that the line of pressure of b falls entirely Within the internal bore of the ring A, as is indicated in Fig. 1. The locking of the ring A under the force thus exerted at right angles to the shaft is further secured, in that the beveled eccentric surfaces of the groove 1) and of theprojection a combine the ring and cap into a solid whole upon the shaft..- It must be further mentioned that the form of the two eccentric surfaces need not necessarilybe the beveled or tapering one shown; but 1 theshape of the eccentric surfaces of a I) must be such that the eccentric part of the cap B 1 engages over the eccentric part of the lockingring A and by means of its gripping-surface is er part in order to insure the correct lockingof the whole device upon the shaft.

. As before stated, the eccentric groove 6 has a greater diameter than the eccentric projectin part a in order that the cap B can be pushe against the rin A. Consequently. a space X is left when th e rings are turned relatively one to another. The turning of thetwo parts A B for fasteninglthe same upon effected in the simplest manner by inserting studs or hooks in. the holes (1?6 and turning ment of the bore, of a ring provided with a concentric bore and an eccentric annular prolongation surrounding the bore and adapted for insertion into said cavity; said cavity and said prolongation being tapering toward both sides from the center.

The foregoing specification signed at Berlin this 10th day of October, 1903.

, CARL SCHMIDT.

In presence 'of-- WOLDEMAR HAUPT, HENRY HASPER.

5 erefrom can be 

